<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <el-button type="primary" @click="showAddCateDialog()"
        >添加分类</el-button
      >
      <!-- 全局组件表格 -->
      <tree-table
        style="margin-top: 15px"
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
        :show-row-hover="false"
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            v-if="!scope.row.cat_deleted"
            style="color: green"
          ></i>
          <i class="el-icon-error" style="color: green" v-else></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level == 0">一级</el-tag>
          <el-tag type="success" v-else-if="scope.row.cat_level == 1"
            >二级</el-tag
          >
          <el-tag type="warning" v-else>三级</el-tag>
        </template>
        <!-- 操作 -->
        <template slot="opt">
          <el-button size="mini" type="primary" icon="el-icon-edit"
            >编辑</el-button
          >
          <el-button size="mini" type="danger" icon="el-icon-delete"
            >删除</el-button
          >
        </template>
      </tree-table>
      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>
    <!-- 添加分类对话框 -->
    <el-dialog
      title="添加分类"
      :visible.sync="addCateDialogVisible"
      width="50%"
      @close="addCateDialogClosed()"
    >
      <el-form
        ref="addCateForm"
        :model="addCateForm"
        label-width="100px"
        :rules="addCateRules"
      >
        <el-form-item label="分类名称" prop="cat_name">
          <el-input v-model="addCateForm.cat_name"></el-input>
        </el-form-item>
        <el-form-item label="父级分类">
          <el-cascader
            clearable
            style="width: 100%"
            v-model="selectedKeys"
            :options="parentCateList"
            :props="{
              expandTrigger: 'hover',
              value: 'cat_id',
              label: 'cat_name',
              children: 'children',
              checkStrictly: true,
            }"
            @change="handleChange"
          ></el-cascader>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCateDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 商品分类数据列表
      catelist: [],
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      total: 0,
      addCateDialogVisible: false,
      //   父级列表数据
      parentCateList: [],
      //   添加分类的表单数据对象
      addCateForm: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0,
      },
      // 选中的父级分类Id数组
      selectedKeys: [],
      addCateRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" },
          { max: 8, message: "长度最多8个字符", trigger: "blur" },
        ],
      },
      columns: [
        {
          label: "分类名称",
          prop: "cat_name",
        },
        {
          label: "是否有效",
          type: "template",
          template: "isok",
        },
        {
          label: "排序",
          type: "template",
          template: "order",
        },
        {
          label: "操作",
          type: "template",
          template: "opt",
        },
      ],
    };
  },
  mounted() {
    this.getCateList();
  },
  methods: {
    // 获取商品分类列表数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories", this.queryInfo);
      if (res.meta.status !== 200) {
        this.$message.error("获取商品分类数据失败");
      }
      this.catelist = res.data;
      this.total = res.data.length;
    },
    // 监听pagesize 改变
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage;
      this.getCateList();
    },
    // 添加分类按钮
    showAddCateDialog() {
      this.addCateDialogVisible = true;
      this.getParentCateList();
    },
    // 获取父级分类的数据列表
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: { type: 2 },
      });
      if (res.meta.status !== 200) {
        this.$message.error("获取父级分类列表数据失败");
      }
      this.parentCateList = res.data;
    },
    // 级联选择项发生改变调用
    handleChange() {
      // 如果selectedKeys数组的长度>0，说明选中了父级分类
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid =
          this.selectedKeys[this.selectedKeys.length - 1];
        this.addCateForm.cat_level = this.selectedKeys.length;
      } else {
        this.addCateForm.cat_pid = 0;
        this.addCateForm.cat_level = 0;
      }
    },
    // 确认添加分类按钮
    async addCate() {
      const { data: res } = await this.$http.post(
        "categories",
        this.addCateForm
      );
      if (res.meta.status !== 200) {
        this.$message.error("添加分类失败");
      }
      this.$message.success("添加分类成功！");
      this.getCateList();
      this.addCateDialogVisible = false;
    },
    // 关闭添加分类的对话框
    addCateDialogClosed() {
      this.$refs.addCateForm.resetFields();
      this.selectedKeys = [];
      this.addCateForm.cat_level = 0;
      this.addCateForm.cat_pid = 0;
    },
  },
};
</script>

<style lang="less" scoped>
</style>